Stopcock having floating plug



se t. zo 1 p 927 M. R. sHlPLEY sToP 009x HAVING FLOATING PLUG Filed May 24, 1926 Patented sept. 2o, 1927.

u .OFFICE-1 uanroivnfsrnrnny, orV MANHATTAN BEACH, carrozzina', AssIGNOR, 'BYk Mazarin I j ASSIGNMENTS, Toorn APPLIANCE MANUFACTURING CORPORATION, orrLos tionto provide a stop cockfhaving a novelV v. oma cApLnffOnNrA, CORPORATION or, ca miroismra.y

- sTOPoOcx HAVING rLoATrNo 'PLUQY f 1YAvelica-tina lcdlv. 94, 1926.' senin no. Arusos.'

i ,Thiszinventionrelates to stop cocksjlThe Ordinaryfformof stop. :cock consistsl of a `body having acavityin which a frusto-ooni cal plugis placed, ythis plug `enga inga -frustorconical .seatwhich vsurrounds t le cav-` ity. Formedfin the bodyand connected to the cavity are inlet and.' outletpassages whichY areconnected together by ,a plug passage when'the plug is 1ny open position. It. is an object of this invention to provide a stop cock inwhich the pressure ofthe fluid bein conducted through themstopz cock supp 'ed to theinterior lof the lplug so that thef plugissubstantially floating, butis firm lyfseated by a separate seating means. y

my invention I rovi'de a plug construction which .has as ell which 1s O en at opposite ends. Extendedfacrossthe ell is a tube which is preferably cylindrical, this tube'forming a conduitforthe Ifluid .and

servin to reinforce the shell. l.The shell is provi ed Withan openingwhich connects the interior thereof with the. inlet passage of the valveibody when the plug is'in closed position.

lIt is accordingly anobject ,of this inven-l fo-rm of floating plug which is adequately re.. i'nforoed.k i' l 3 y When the stop cock is used. onlines handling viscous fluids, s rup, for example, it is l advisable Ato fill the interior offgthe shell `Iof the plug- 'with 'a pressure', transmitting-substance so" that the. viscous lHuid being con- "It is "accordingly ducted through the stop. cock will not pass tothe interior of the plug". This is desirable since the` Aviscous fluidwould'collect in the interior ofy'the *plu ,5 making, the stop cock. dilicult to clean. 'T eV pressure-'transmitting substance may be any y,substance,which is' ca able vof transmittingpressure such as a jel y-like substance.` c, f t L an ob'ect of .this invention 'to rovide a'stop'co'c in which the interior of) the vplug (is supplied with a pressuretransmitting su` stance. Y ,y t .In the sto cock'of my .invention when the plug is in c Osed position lthe opening which connects to the ,interior` thereof lmust'fcommunicate with th'epressure passagecof .the body sothat the fluid pressure will be transnii'tted'to the interiorofthe plug. p' The valve of `my ,inw'fention hasfav separate lstem by s means' ofA which the s plug rotated. .,It 1s therefore essential that these parts be assem' bled in a .certain .manner so that when the' stoprcock is shut off the plug will turned intopropergclos'ed position.` v It 1s accordingly an object of this invention.` to provide ay meansv which insures'a properY assembling vof the plug' and parts thereof. i Other objects and advanta es of thelinvention will be made manifest ereinafter. -Referringto the drawing which isfor` illustrativepurposesonly,

Fig. 1 1s a. vertical section through a stopl cock embodying the features of my invention.

- Fig. 2 is a section takenv on the line 2-20f Fig. 6 a view sirnilarto Fig.,i*3 *showinga valve .plug in-closed position and` floating in a rassure, trans'xnittlng'.-v substance.. Re erringtothe drawing .thenumeral 11 represents a stOpfjco'ck--body aving a central cavityr12 which connects to upper and lower .faces 13 and 14. Thecavi'y 12 provides-a frusto-conical,V seat 15. r he .upper Vand smallerend of :the 4cavity 12v is` closedby a1 isection ltaken on the .4--4l taken on the line 3 3 l cover` 17 which issecuredA in place by capv l screws l18, and the lower and largerV end of the cavity isclosed by a plate 19whichissecured in place by cap screws-20. Connected `.to the cavity 12 is an inlet passage 21lfand an Outlet passage22.

, Placed in the cavity l12 is ay The plug 25 has a frusto-conical s ell..26'fwhich-f` provldes` an outer .truste-conicalA lseat 27 .y

adapted to engagegthe frusto-conical seatv 15. The shell 26is openat both endsand the fin terior thereof provides a balance chamber 28. A duct 29 connects the'lilance `chamber 28l with the exterior of thev plug.` The rplug 25y also has a tube-30 which is. preferabl cylindrical which extends across the ba ance chamber 28. The ltubev30'is formedinte .grally withthe shell 26. When .thefplug 25 1s in Open position, as shownin the drawlng, a passage 3l provided byl the tube 30-con nects the inletand outlet passages 21 and 22 of thebody 11 together.V Extending downrliaving a ltongue 46.

tongue 46 is offset from the hne .A-A

ward from the lower' part of the tube 30 is a projection 33 which is engaged by the bottom of a thimble 34. The thimb e 34 extends into a cavity 35 provided by the plate 19. Within the thimble 34 and the cavity 35 is a spring 36 which is compressed' and which exerts a pressure against theprojection so as to force the plug 25 upward so that the frusto-conical face 27 eiiages the `frusta conical seat 15, thus provi n a tight seal.

The cover 17 has l. cylin rical extension .an opening 41 through which a stem 42 extends. The stem 42 has a. seat 43 adapted to e a face 44 of the cover 17. The inner en o the stem 42 is provided in the form of a head 45 which rests in the cavity 12 and artly in the balance chamber 28. The p ug 25has an upwardly extending engageable member in the form of. Referring to 4, the

which extends through the axis of rotation lof the plu 25. The head 45 of the stem 42 is provi d with a groove 47, into which the tongue 46 extends. This groove 47 is offset as shown so asto correspond to the tongue 46. The upper end of the stem 42 is provided with an irre wrench-receiving portion 49, w ich is adapted to extend into an opening 50 of a wrench 51. The shape of the portion 49 is such that i the wrench can only be installed thereon in a i direction or pressure passa 28. This -certain position. This is also true -with re-` spect to the tongue and groove arrangement 0f the plu and stem; that is, they can only be i assemb edA in certain relative positions. In the draw' the plug 25 is shown in open ition, the ug passage 31 connectingthe inletand out et passages 21 and 22 together. When in closed position the plu 25 is rotated ninet de and is rotat in such a to the balance chamber is very important so that the iuid pressure will be'transferred to the interior of the plug so that it will be floatin In some cases where heavy or viscous iui Aare l i handled, it is`desirable to `fill the balance chamber 28 as shown in Fig. 6 with a resi surePtransmittin substance 29 vwhic is preferably of a )elly-like consistenc -This pressure-transmitting substance wil permit Ithepressure of the Huid to be transferred to the interior of the plug25, renderin it a `floating plug, but will preventy theA uid from passing tuto the balance chamber. The pressure in the balance chamber 28 is equal in al1 directions and therefore, as will ysure lon the plug 25. and wi ar shaped in w ich a casinps with at t e duct 29 connects the inlet angers 25 is the same at all times, regardless .plug1 of t e pressure of the liuid being-conducted through the valve, because of the fact that the fluid pressure is communicated to the interior of` the plug in such a manner` that it is floating andV therefore the fluid pressure will have no effect of seatingor removing the plug from its seat.

I The construction of the plug is a very iml portant art of this invention. The provi `sion of t e shell 26 andtube 30 is veryimportant. The tube 30 provides a conduit the lluid sli htlylar r than the inlet and `outlet as-l Y g he ceci is sages 22; t erefore, when the stop o en the assa o structib e, w ich is very esirable. v.The

orcing the;

s therefhmu ii will be un! saA stop cock isextremely easy to clean. In I some industries the lawrequiras that the ipe lines be cleaned at -certain intervals.`

he ordinary form of valvemakes it very diliicult to clean these lines, in moet cases requiring that the valve be completely Clisimantled. In my invention this.is"not necessary. .When-,it is desired to clean the valve, the plug 25 is turned into open osi tion and a clear passage is` provided t erethrough, through which a.` swab or other cleanin device may be passed in order to thoroug ily clean the pipe line in which the stop cock is included and the p :f: 21, 22 and 81 ofthe stop cock itself.. Y The stop-,cock of m invention isespe-4 ciall valuable inthe o' -producing industry v,upper end oft s casing being a valve or stug: at'certaintimes to which is accomplished by means of` a bailer provided It is necessa which has to be dro throu h the With the ordinary crm of v ve, this valve lili) extended im@ i weil, the 105 cock ail `sand froml the we it is not necessary to removeit,` itbeing 4only necessary to turn the pl 25 into open position whichgives an uno ructed. passage through the stop cock which is as large `11s the passage through the .casing itself.

lis

'The feature of providing a gfull-floating`V either tending to seat it too i htly so as to bind it or to force it awayv rom the seat, causing leakage.A Inmy invention the plug is floating at all times and'theluidpressure in no way ailects its position. 4 The plug is t however, seated by-the action of the spring 36 which exerts the same pressure on the Aplug at ally times; therefore, it will be seen that the stop cock of this invention may be lio` must be removed for hailing.` 'When the Y 4stop cock of my invention isused, however,

used regardless of the pressure cf the uid which is conducted therethrough.

' The feature of forming the lug 25, the stem 42 and the handle 51 so t at they can be assembled only in certain relative positions, is important to the invention, since when the plug is. in closed position it must be in such a position that the duct 29 communicates with the pressure passage of the body.l This is very essential in some uses of the stop cock; for exam le, in the -oilproducing industry the s ush pumps employed for pumping slush into the well are slush may be pumpe connected to a sin le pipe line, and the therethrough in either direction. When the stop cock of my invention is used on this pipe line connected to the slush pump, it is necessary when lthe valve is closed to have the duct communicating with the pressure passage of the stop cock body. IVhen one slush pump is in operation, the lug must be in one position when closed, and) when the other slush pump is in operation, the plug must be in another position. The parts are so arranged that the handle 51, when the plug 25 is in closed position, is extended towards the pressure side. If the lu 25, the stem 42 and the handle 51, cou d e assembled in other than the proper manner, it would be im ossible to discern which direction the han e was to extend when the plug is vremoved to closed position.

I claim as my invention: 1. A stop cock comprising: a body having an inlet passage, an outlet passage, and a closed cavity between said inlet and outlet passages, said closed cavity being surrounded said closed cavity, said plug havin a shelly ada ted to engage'said frusta-conical seat,

sai shell beingopen 4at the ends, and a tu'bel extending through a balance chamber formed by said shell, said Atube having a plug passage connecting said inlet and outlet passages ytogether when said plug is in open position, there being a duct in said shell for connecting said balance chamber to said inlet passage when said plug'is in closedposition; a pressure-transmitting substance substantially filling said 'balance chamber; and means for rotating said plug.

2. A stop cock comprising: a body having an inlet passage, an outlet passage, and a closed cavity between said inlet and outlet passages, said closed cavity being surrounded by a frusto-conical seat; a, lug disposed in said closed cavity, said pliig having a shell adapted to engage said' frusto-conical seat, said shell being open at the ends, and a tube extendin formed by said` shell, said tubel having a through 'a balance chamber plug passage connecting said inlet and outlet passages together when said plug is in open position, there being a duct 1n said shel-l for connecting said balance 4chamber to said inlet passage when'the lug is in closed position; resilient means fldr forcing said plug against said frusto-conical seat; pressure transmitting substance substantially filling said balance chamber; and means for rotating said plug. l

In testimony whereof, I have hereunto set my hand at Los Angeles, California, this l .18th (la-y of May, .1926.

MARION R. SHIPLEY. 

